Class: MapPrint::LegendHandler

Inherits:
Object
  • Object
show all
Includes:
PngHandlers::Texts, Validations::Size
Defined in:
lib/map_print/legend_handler.rb

Constant Summary collapse

OVERFLOW = 
{
  expand: 'expand',
  compact: 'compact',
  hidden: 'hidden'
}
VERTICAL = 
'vertical'
HORIZONTAL = 
'horizontal'

Instance Method Summary collapse

Methods included from Validations::Size

#validate_size!

Methods included from PngHandlers::Texts

#draw_text, #print_texts, #sanitize_options

Constructor Details

#initialize(legend) ⇒ LegendHandler

Returns a new instance of LegendHandler.



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# File 'lib/map_print/legend_handler.rb', line 17

def initialize(legend)
  @legend = legend
  validate_data!
  overflow_option_adjustments
  @x_step = @legend[:size][:width] / @legend[:columns]
  @y_step = @legend[:size][:height] / @legend[:rows]
  @elements_in_block = @legend[:orientation] == VERTICAL ? @legend[:rows] : @legend[:columns]
  @legend[:textbox_style] ||= {}

  if @legend[:textbox_size]
    @legend[:textbox_style][:size] = "#{@legend[:textbox_size][:width]}x#{@legend[:textbox_size][:height]}"
  end
end

Instance Method Details

#process ⇒ Object 



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# File 'lib/map_print/legend_handler.rb', line 31

def process
  size = @legend[:size]
  tempfile = Tempfile.new ['legend', '.png']
  `convert -density 300 -size #{size[:width]}x#{size[:height]} xc:white #{tempfile.path}`
  image = MiniMagick::Image.new tempfile.path

  image_geometry = ''
  textbox_offset = 0

  if @legend[:image_size]
    image_geometry += "#{@legend[:image_size][:width]}x#{@legend[:image_size][:height]}"
    textbox_offset += @legend[:image_size][:width] if @legend[:image_size][:width]
  end
  textbox_offset += @legend[:textbox_offset] if @legend[:textbox_offset]

  print(image, image_geometry, textbox_offset)
  image
end